The brake is on the rearend. Depending on what year the mower is will tell you which side of the rearend it is on. More recent mower will have it on the right side of the mower. You should be able to look under the mower just in front of the right rear wheel and see the rod going from the linkage to the rearend. It goes through a lever on the rearend. There is a nut where that pivots. If you tighten that nut it will adjust the brake.
MTD
Go to the mtd website, you will find them there.
What is the valve setting on a 15.5 hp yard machine mower by MTD?
MTD makes the Yard Machines mowers. You can find parts and manuals at www.mtdproducts.com
how do u adjust deck on yard machine made by mtd 42 inch cut 16,5 horse
On most MTD riders it is right by the seat hinge on the right side as you sit on the mower.
MTD, Same as Yard Man, Yard Machine, Troy-Built, Cub-Cadet, and others.
50 to 1
in the oil filler tube... ie the same place you check the oil level
MTD
You can find diagrams for changing belts on an MTD Yard Machine model 13AC762F370 in the owner's manual, which is often available on the MTD website or through customer support. Additionally, online forums, YouTube tutorials, and repair websites like eReplacementParts or PartsTree may provide helpful visuals and step-by-step guides. Checking local repair shops or parts dealers can also yield useful resources.
The engine is manufactured in China, which I am assuming you mean the Powermore 357cc engine. The plant in China is a partnership of MTD in Canada...